CVE-2026-24687: Umbraco.Forms has Path Traversal and File Enumeration Vulnerabilities in Linux/Mac

January 30, 2026

It’s possible for an authenticated backoffice-user to enumerate and traverse paths/files on the systems filesystem and read their contents, on Mac/Linux Umbraco installations using Forms. As Umbraco Cloud runs in a Windows environment, Cloud users aren’t affected.

References

github.com/advisories/GHSA-hm5p-82g6-m3xh
github.com/umbraco/Umbraco.Forms.Issues
github.com/umbraco/Umbraco.Forms.Issues/security/advisories/GHSA-hm5p-82g6-m3xh
nvd.nist.gov/vuln/detail/CVE-2026-24687

Code Behaviors & Features

Detect and mitigate CVE-2026-24687 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →